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The hydroxyl radical, OH, is an important component of many natural andtechnological plasmas but there is little available information on processesinvolving its collisions with low-energy electrons. Low-energy electroncollisions with OH are studied in the framework of the R-matrix method.Potential energy curves of some of the low lying target states of doublet andquartet symmetry which go to the O(3P)+H(2S), O(1D)+H(2S) and O(1S)+H(2S)asymptotic limits are obtained for inter nuclear separations between 1 - 6 a0.Scattering calculations are performed at the OH equilibrium geometry Re =1:8342 a0 to yield cross sections for elastic scattering, electronicexcitations form the X2\Pi ground state to the three excited states ofA2Sigma+, a 4Sigma, 1 2Sigma symmetry and for electron impact dissociation ofOH. The positions and widths for negative ion resonances in the e{OH system areused estimate the cross section for dissociative electron attachment to OHwhich is found to be significant at electron energies about 1.5 eV.

Calculated cross sections for low energy electron collision with OH